[Python] Can you annotate return type when value is instance of cls?

Given a class with a helper method for initialization:

class TrivialClass:
def __init__(self, str_arg: str):
self.string_attribute = str_arg

@classmethod
def from_int(cls, int_arg: int) -> ?:
str_arg = str(int_arg)
return cls(str_arg)


Is it possible to annotate the return type of the from_int method?

I'v tried both cls and TrivialClass but PyCharm flags them as unresolved references which sounds reasonable at that point in time.

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